Compound and organic light-emitting device including the same

ABSTRACT

A compound is represented by Formula 1 below: 
     
       
         
         
             
             
         
       
     
     wherein each of Ar 1 , Ar 2 , and L is independently selected from a list of substituted or unsubstituted aryl groups, l is 0 or 1, m is an integer from 1 to 5, n is 2 or 3. When m is two or more, two or more L(s) are identical to or different from each other. M indicates a post-transition metal or a transition metal.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of Korean Patent Application No.10-2016-0131620 filed on Oct. 11, 2016 in the Korean IntellectualProperty Office, the disclosure of which is incorporated herein in itsentirety by reference.

BACKGROUND 1. Field

One or more embodiments relate to a compound and an organiclight-emitting device including the same.

2. Description of the Related Art

Organic light-emitting devices are self-emission devices that producefull-color images, and also have wide viewing angles, high contrastratios, short response times, as well as excellent characteristics interms of brightness, driving voltage, and response speed.

An example of such organic light-emitting devices may include a firstelectrode disposed on a substrate, and a hole transport region, anemission layer, an electron transport region, and a second electrode,which are sequentially disposed on the first electrode. Holes providedfrom the first electrode may move toward the emission layer through thehole transport region, and electrons provided from the second electrodemay move toward the emission layer through the electron transportregion. Carriers, such as holes and electrons, recombine in the emissionlayer to produce excitons. These excitons transit from an excited stateto a ground state, thereby generating light.

SUMMARY

One or more embodiments provide a compound suitable for use as alight-emitting material and an organic light-emitting device includingthe same, wherein the organic light-emitting device has high efficiency,a low driving voltage, high luminance, and long lifespan.

Additional aspects will be set forth in part in the description whichfollows and, in part, will be apparent from the description, or may belearned by practice of the presented embodiments.

An aspect provides a compound represented by Formula 1:

In Formula 1,

Ar₁ and Ar₂ may each independently be selected from a substituted orunsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, asubstituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted orunsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC₂-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₆-C₆₀ aryloxy group, asubstituted or unsubstituted C₆-C₆₀ arylthio group, a substituted orunsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group,

L may be selected from a substituted or unsubstituted C₆-C₆₀ arylenegroup, a substituted or unsubstituted C₁-C₆₀ heteroarylene group, asubstituted or unsubstituted divalent non-aromatic condensed polycyclicgroup, and a substituted or unsubstituted divalent non-aromaticcondensed heteropolycyclic group,

l may be 0 or 1,

m may be an integer from 1 to 5,

n may be 2 or 3,

when m is two or more, two or more L(s) may be identical to or differentfrom each other,

M indicates a post-transition metal or a transition metal,

at least one substituent of the substituted C₁-C₆₀ alkyl group, thesubstituted C₂-C₆₀ alkenyl group, the substituted C₂-C₆₀ alkynyl group,the substituted C₁-C₆₀ alkoxy group, the substituted C₃-C₁₀ cycloalkylgroup, the substituted C₂-C₁₀ heterocycloalkyl group, the substitutedC₃-C₁₀ cycloalkenyl group, the substituted C₂-C₁₀ heterocycloalkenylgroup, the substituted C₆-C₆₀ aryl group, the substituted C₆-C₆₀ aryloxygroup, the substituted C₆-C₆₀ arylthio group, the substituted C₁-C₆₀heteroaryl group, the substituted monovalent non-aromatic condensedpolycyclic group, the substituted monovalent non-aromatic condensedheteropolycyclic group, the substituted C₆-C₆₀ arylene group, thesubstituted C₁-C₆₀ heteroarylene group, the substituted divalentnon-aromatic condensed polycyclic group, and the substituted divalentnon-aromatic condensed heteropolycyclic group may be selected from:

deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed heteropolycyclic group,—N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and —B(Q₁₆)(Q₁₇);

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group; and

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed heteropolycyclic group, —N(Q₂₁)(Q₂₂),—Si(Q₂₃)(Q₂₄)(Q₂₅), and —B(Q₂₆)(Q₂₇), and

Q₁₁ to Q₁₇ and Q₂₁ to Q₂₇ may each independently be selected fromhydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group,a nitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

Another aspect provides an organic light-emitting device including: afirst electrode; a second electrode facing the first electrode; and anorganic layer that is disposed between the first electrode and thesecond electrode and includes an emission layer, wherein the organiclayer includes the compound described above.

Another aspect provides a flat panel display apparatus including theorganic light-emitting device, wherein the first electrode of theorganic light-emitting device is electrically connected to a sourceelectrode or a drain electrode of a thin film transistor.

BRIEF DESCRIPTION OF THE DRAWING

These and/or other aspects will become apparent and more readilyappreciated from the following description of the embodiments, taken inconjunction with FIG. 1 which is a schematic view of an organiclight-emitting device according to an embodiment.

DETAILED DESCRIPTION

A compound according to an embodiment is represented by Formula 1:

In Formula 1,

Ar₁ and Ar₂ may each independently be selected from a substituted orunsubstituted C₁-C₆₀ alkyl group, a substituted or unsubstituted C₂-C₆₀alkenyl group, a substituted or unsubstituted C₂-C₆₀ alkynyl group, asubstituted or unsubstituted C₁-C₆₀ alkoxy group, a substituted orunsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC₂-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₆-C₆₀ aryloxy group, asubstituted or unsubstituted C₆-C₆₀ arylthio group, a substituted orunsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group,

L may be selected from a substituted or unsubstituted C₆-C₆₀ arylenegroup, a substituted or unsubstituted C₁-C₆₀ heteroarylene group, asubstituted or unsubstituted divalent non-aromatic condensed polycyclicgroup, and a substituted or unsubstituted divalent non-aromaticcondensed heteropolycyclic group,

l may be 0 or 1,

m may be an integer from 1 to 5,

n may be 2 or 3,

when m is two or more, two or more L(s) may be identical to or differentfrom each other,

M indicates a post-transition metal or a transition metal,

at least one substituent of the substituted C₁-C₆₀ alkyl group, thesubstituted C₂-C₆₀ alkenyl group, the substituted C₂-C₆₀ alkynyl group,the substituted C₁-C₆₀ alkoxy group, the substituted C₃-C₁₀ cycloalkylgroup, the substituted C₂-C₁₀ heterocycloalkyl group, the substitutedC₃-C₁₀ cycloalkenyl group, the substituted C₂-C₁₀ heterocycloalkenylgroup, the substituted C₆-C₆₀ aryl group, the substituted C₆-C₆₀ aryloxygroup, the substituted C₆-C₆₀ arylthio group, the substituted C₁-C₆₀heteroaryl group, the substituted monovalent non-aromatic condensedpolycyclic group, the substituted monovalent non-aromatic condensedheteropolycyclic group, the substituted C₆-C₆₀ arylene group, thesubstituted C₁-C₆₀ heteroarylene group, the substituted divalentnon-aromatic condensed polycyclic group, and the substituted divalentnon-aromatic condensed heteropolycyclic group may be selected from:

deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed heteropolycyclic group,—N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and —B(Q₁₆)(Q₁₇);

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group; and

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed heteropolycyclic group, —N(Q₂₁)(Q₂₂),—Si(Q₂₃)(Q₂₄)(Q₂₅), and —B(Q₂₆)(Q₂₇), and

Q₁₁ to Q₁₇ and Q₂₁ to Q₂₇ may each independently be selected fromhydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group,a nitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

A blue light-emitting compound having a diphenylanthracene structure inthe center thereof and an aryl group substituted at an end thereof,wherein the blue light-emitting compound is a blue light-emittingmaterial, and an organic light-emitting device using the bluelight-emitting compound are disclosed. However, light emissionefficiency and luminance of the organic light-emitting device areinsufficient.

Additionally, an organic light-emitting device using a substitutedpyrene-based arylamine compound, various diamine compounds, or achrysene-based arylamine compound is disclosed. However, blue colorpurity of such an organic light-emitting device is low. Thus, it isdifficult to realize a deep blue color. Consequently, there is alimitation in implementing a full-color display capable of producingnatural colors.

An organometallic compound having an arylamine beta-diketone structureincluding a post-transition metal (Al, Ga, In, Sn, Tl, Pb, Bi, Po, orthe like) or a transition metal (Zn, Cu, Ti, Zr, Cr, Co, Ag, Au, or thelike), according to one or more embodiments, may be a compound having anovel structure with considerably improved optical characteristics dueto the structure of the compound itself. The organometallic compound maybe used in combination with an arylamine substituent including variouscondensed polycyclic groups so as to implement an organic light-emittingdevice having high efficiency and a long lifespan.

The compounds of Formula 1 according to one or more embodiments functionas a light-emitting material. In addition, compounds including amolecule of Formula 1 are arylamine beta-diketone organometalliccompounds including a post-transition metal (Al, Ga, In, Sn, Tl, Pb, Bi,Po, or the like) or a transition metal (Zn, Cu, Ti, Zr, Cr, Co, Ag, Au,or the like) and are advantageous in terms of light emission efficiencyand energy transfer. An organic light-emitting device manufactured byusing the arylamine beta-diketone organometallic compound has highdurability in terms of driving. In addition, the arylamine beta-diketoneorganometallic compound may be used in combination with existingfluorescent and phosphorescent dopants to improve efficiency andlifespan characteristics of an organic light-emitting device.

M in Formula 1 may be linked to O of a ketone via a coordinate bond andmay be indicated by a dashed line as shown below:

In one or more embodiments, M in Formula 1 may be Al, Ga, In, Sn, Tl,Pb, Bi, Po, Zn, Cu, Ti, Zr, Cr, Co, Ag, or Au. For example, M may be Al,Zn, or Cu.

In one or more embodiments, two neighboring substituents of Ar₁, Ar₂,and L in Formula 1 may be linked to form a ring.

In one or more embodiments, Ar₁ and Ar₂ in Formula 1 may eachindependently be represented by one of Formulae 2a to 2c:

In Formulae 2a to 2c, H₁ may be O, S, NR₂₁, or CR₂₂R₂₃,

R₂₁ to R₂₃ and Z₁ may each independently be selected from hydrogen,deuterium, halogen, a substituted or unsubstituted C₁-C₂₀ alkyl group, asubstituted or unsubstituted C₁-C₂₀ alkenyl group, a substituted orunsubstituted C₆-C₂₀ aryl group, a substituted or unsubstituted carbonC₁-C₂₀ heteroaryl group, a substituted or unsubstituted monovalentnon-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group,

p may be an integer from 1 to 7,

when p is two or more, two or more Z₁(s) may be identical to ordifferent from each other, and

* indicates a binding site.

In one or more embodiments, L in Formula 1 may be represented by one of

Formulae 3a to 3e:

In Formulae 3a to 3e, Z₁ may be selected from hydrogen, deuterium,halogen, a substituted or unsubstituted C₁-C₂₀ alkyl group, asubstituted or unsubstituted C₆-C₂₀ aryl group, a substituted orunsubstituted C₁-C₂₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group,

when p is two or more, two or more Z₁(s) may be identical to ordifferent from each other, and

* indicates a binding site.

For example, Z₁ may be a substituted or unsubstituted carbon C₁-C₂₀alkyl group.

In one or more embodiments, the compound represented by Formula 1 may berepresented by Formula 2:

In one or more embodiments, the compound represented by Formula 1 may berepresented by Formula 3:

Symbols and substituents in Formulae 2 and 3 are the same as describedabove, and L′ in Formula 3 is the same as described in connection with Lin Formula 1.

In one or more embodiments, the compound represented by Formula 1 may berepresented by Formula 4, 5, 6, 7, or 8:

In Formula 4, Z₁ may be selected from hydrogen, deuterium, halogen, asubstituted or unsubstituted C₁-C₂₀ alkyl group, a substituted orunsubstituted C₆-C₂₀ aryl group, a substituted or unsubstituted C₁-C₂₀heteroaryl group, a substituted or unsubstituted monovalent non-aromaticcondensed polycyclic group, and a substituted or unsubstitutedmonovalent non-aromatic condensed heteropolycyclic group, and

when p is two or more, two or more Z₁(s) may be identical to differentfrom each other.

Symbols and substituents in Formulae 4 to 8 are the same as describedabove.

In one or more embodiments, the compound represented by Formula 1 may beselected from the following compounds, but embodiments of the presentdisclosure are not limited thereto:

The term “organic layer” used herein refers to a single layer and/or aplurality of layers disposed between the first electrode and the secondelectrode of an organic light-emitting device. A material included inthe “organic layer” is not limited to an organic material.

FIG. 1 is a schematic view of an organic light-emitting device 10according to an embodiment. The organic light-emitting device 10includes a first electrode 110, an organic layer 150, and a secondelectrode 190.

Hereinafter, the structure of an organic light-emitting device accordingto an embodiment and a method of manufacturing an organic light-emittingdevice according to an embodiment will be described in connection withFIG. 1.

In FIG. 1, a substrate may be additionally disposed under the firstelectrode 110 or above the second electrode 190. The substrate may be aglass substrate or a transparent plastic substrate, each havingexcellent mechanical strength, thermal stability, transparency, surfacesmoothness, ease of handling, and water resistance.

The first electrode 110 may be formed by depositing or sputtering amaterial for forming the first electrode 110 on the substrate. When thefirst electrode 110 is an anode, the material for forming the firstelectrode 110 may be selected from materials with a high work functionto facilitate hole injection. The first electrode 110 may be areflective electrode, a semi-transmissive electrode, or a transmissiveelectrode. The material for forming the first electrode 110 may be atransparent and highly conductive material, and examples of such amaterial are indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide(SnO₂), and zinc oxide (ZnO). When the first electrode 110 is asemi-transmissive electrode or a reflective electrode, at least oneselected from magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li),calcium (Ca), magnesium-indium (Mg—In), and magnesium-silver (Mg—Ag) maybe used as a material for forming the first electrode 110.

The first electrode 110 may have a single-layered structure, or amulti-layered structure including two or more layers. For example, thefirst electrode 110 may have a three-layered structure of ITO/Ag/ITO,but the structure of the first electrode 110 is not limited thereto.

The organic layer 150 is disposed on the first electrode 110. Theorganic layer 150 may include an emission layer.

The organic layer 150 may further include a hole transport regionbetween the first electrode and the emission layer, and an electrontransport region between the emission layer and the second electrode.

In one or more embodiments, the hole transport region may include atleast one selected from a hole transport layer, a hole injection layer,a buffer layer, and an electron blocking layer, and an electrontransport region may include at least one selected from a hole blockinglayer, an electron transport layer, and an electron injection layer.However, it may be understood that embodiments of the present disclosureare not limited thereto.

The hole transport region may have a single-layered structure formed ofa single material, a single-layered structure formed of a plurality ofdifferent materials, or a multi-layered structure having a plurality oflayers formed of a plurality of different materials.

For example, the hole transport region may have a single-layeredstructure formed of a plurality of different materials, or a holeinjection layer/hole transport layer structure, a hole injectionlayer/hole transport layer/buffer layer structure, a hole injectionlayer/buffer layer structure, a hole transport layer/buffer layerstructure, or a hole injection layer/hole transport layer/electronblocking layer structure, wherein layers of each structure aresequentially stacked from the first electrode 110 in this stated order,but are not limited thereto.

When the hole transport region includes a hole injection layer, the holeinjection layer may be formed on the first electrode 110 by using one ormore suitable methods selected from vacuum deposition, spin coating,casting, Langmuir-Blodgett (LB) deposition, ink-jet printing,laser-printing, and laser-induced thermal imaging.

When a hole injection layer is formed by vacuum deposition, for example,the vacuum deposition may be performed at a deposition temperature ofabout 100° C. to about 500° C., at a vacuum degree of about 10⁻⁸ torr toabout 10⁻³ torr, and at a deposition rate of about 0.01 Å/sec to about100 Å/sec by taking into account the compound for the hole injectionlayer to be deposited, and the structure of the hole injection layer tobe formed.

When a hole injection layer is formed by spin coating, the spin coatingmay be performed at a coating rate of about 2,000 rpm to about 5,000rpm, and at a temperature of about 80° C. to about 200° C. by takinginto account the compound for the hole injection layer to be deposited,and the structure of the hole injection layer to be formed.

When the hole transport region includes a hole transport layer, the holetransport layer may be formed on the first electrode 110 or the holeinjection layer by using one or more suitable methods selected fromvacuum deposition, spin coating, casting, a LB method, ink-jet printing,laser-printing, and laser-induced thermal imaging. When the holetransport layer is formed by vacuum deposition or spin coating,deposition and coating conditions for the hole transport layer may bethe same as the deposition and coating conditions for the hole injectionlayer.

The hole transport region may include m-MTDATA, TDATA, 2-TNATA, NPB,β-NPB, TPD, Spiro-TPD, Spiro-NPB, α-NPB, TAPC, HMTPD,4,4′,4″-tris(N-carbazolyl)triphenylamine (TCTA),polyaniline/dodecylbenzenesulfonic acid (PANI/DBSA),poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS),polyaniline/camphor sulfonicacid (PANI/CSA),polyaniline/poly(4-styrenesulfonate) (PANI/PSS), a compound representedby Formula 201 below, or a compound represented by Formula 202 below:

In Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may each independently be selected from a substituted orunsubstituted C₆-C₆₀ arylene group, a substituted or unsubstitutedC₁-C₆₀ heteroarylene group, a substituted or unsubstituted divalentnon-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group;

xa1 to xa4 may each independently be selected from 0, 1, 2, and 3;

xa5 may be selected from 1, 2, 3, 4, and 5; and

R₂₀₁ to R₂₀₄ may each independently be selected from a substituted orunsubstituted C₃-C₁₀ cycloalkyl group, a substituted or unsubstitutedC₂-C₁₀ heterocycloalkyl group, a substituted or unsubstituted C₃-C₁₀cycloalkenyl group, a substituted or unsubstituted C₂-C₁₀heterocycloalkenyl group, a substituted or unsubstituted C₆-C₆₀ arylgroup, a substituted or unsubstituted C₆-C₆₀ aryloxy group, asubstituted or unsubstituted C₆-C₆₀ arythio group, a substituted orunsubstituted C₁-C₆₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group.

In one or more embodiments, in Formulae 201 and 202,

L₂₀₁ to L₂₀₅ may each independently be selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorene group, a dibenzofluorenegroup, a phenanthrenylene group, an anthracenylene group, a pyrenylenegroup, a chrysenylene group, a pyridinylene group, a pyrazinylene group,a pyrimidinylene group, a pyridazinylene group, a quinolinylene group,an isoquinolinylene group, a quinoxalinylene group, a quinazolinylenegroup, a carbazolylene group, and a triazinylene group; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorene group, a dibenzofluorenegroup, a phenanthrenylene group, an anthracenylene group, a pyrenylenegroup, a chrysenylene group, a pyridinylene group, a pyrazinylene group,a pyrimidinylene group, a pyridazinylene group, a quinolinylene group,an isoquinolinylene group, a quinoxalinylene group, a quinazolinylenegroup, a carbazolylene group, and a triazinylene group, each substitutedwith at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a biphenyl group, a terphenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group;

xa1 to xa4 may each independently be 0, 1, or 2,

xa5 may be 1, 2, or 3, and

R₂₀₁ to R₂₀₄ may each independently be selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group, each substituted with at leastone selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, abiphenyl group, a terphenyl group, a naphthyl group, an azulenyl group,a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group, but they are not limitedthereto.

The compound represented by Formula 201 may be represented by Formula201A:

In one embodiment, the compound represented by Formula 201 may berepresented by Formula 201A-1 below, but embodiments of the presentdisclosure are not limited thereto:

For example, the compound represented by Formula 202 may be representedby Formula 202A below, but embodiments of the present disclosure are notlimited thereto:

L₂₀₁ to L₂₀₃, xa1 to xa3, xa5, and R₂₀₂ to R₂₀₄ in Formulae 201A, 201A-1and 202A are already described in detail above, and R₂₁₁ may beunderstood by referring to the description provided herein in connectionwith R₂₀₃, and R₂₁₃ to R₂₁₆ may each independently be selected fromhydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group,a nitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, aC₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, and a monovalent non-aromaticcondensed heteropolycyclic group.

For example, in Formulae 201A, 201A-1, and 202A,

L₂₀₁ to L₂₀₃ may each independently be selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, a chrysenylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, aquinolinylene group, an isoquinolinylene group, a quinoxalinylene group,a quinazolinylene group, a carbazolylene group, and a triazinylenegroup; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, a chrysenylene group, a pyridinylene group, apyrazinylene group, a pyrimidinylene group, a pyridazinylene group, aquinolinylene group, an isoquinolinylene group, a quinoxalinylene group,a quinazolinylene group, a carbazolylene group, and a triazinylenegroup, each substituted with at least one selected from deuterium, —F,—Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an aminogroup, an amidino group, a hydrazine group, a hydrazone group, acarboxylic acid group or a salt thereof, a sulfonic acid group or a saltthereof, a phosphoric acid group or a salt thereof, a C₁-C₂₀ alkylgroup, a C₁-C₂₀ alkoxy group, a phenyl group, a biphenyl group, aterphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group,

xa1 to xa3 may each independently be 0 or 1,

R₂₀₃, R₂₁₁, and R₂₁₂ may each independently be selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group, each substituted with at leastone selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, abiphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group,a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenylgroup, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group,

R₂₁₃ and R₂₁₄ may each independently be selected from:

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a phenyl group, a biphenyl group, a terphenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group, each substituted with at leastone selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, abiphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group,a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenylgroup, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group, and

R₂₁₅ and R₂₁₆ may each independently be selected from:

hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group,a nitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₁-C₂₀ alkyl group, and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a phenyl group, a biphenyl group, a terphenylgroup, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, abenzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group,an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinylgroup, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, aquinolinyl group, an isoquinolinyl group, a quinoxalinyl group, aquinazolinyl group, a carbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, and a triazinyl group; and

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group, each substituted with at leastone selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, abiphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group,a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenylgroup, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group, and

xa5 is 1 or 2.

R₂₁₃ and R₂₁₄ in Formulae 201A and 201A-1 may be linked to form asaturated or unsaturated ring.

The compound represented by Formula 201, and the compound represented byFormula 202 may each include compounds HT1 to HT20 illustrated below,but are not limited thereto.

A thickness of the hole transport region may be in a range of about 100Å to about 10,000 Å, for example, about 100 Å to about 1,000 Å. When thehole transport region includes a hole injection layer and a holetransport layer, the thickness of the hole injection layer may be in arange of about 100 Å to about 10,000 Å, and for example, about 100 Å toabout 1,000 Å, and the thickness of the hole transport layer may be in arange of about 50 Å to about 2,000 Å, and for example, about 100 Å toabout 1,500 Å. When the thicknesses of the hole transport region, thehole injection layer and the hole transport layer are within theseranges, satisfactory hole transporting characteristics may be obtainedwithout a substantial increase in driving voltage.

The hole transport region may further include, in addition to thesematerials, a charge-generation material for the improvement ofconductive properties. The charge-generation material may behomogeneously or non-homogeneously dispersed in the hole transportregion.

The charge-generation material may be, for example, a p-dopant. Thep-dopant may be one selected from a quinone derivative, a metal oxide,and a cyano group-containing compound, but embodiments of the presentdisclosure are not limited thereto. For example, non-limiting examplesof the p-dopant are a quinone derivative, such astetracyanoquinonedimethane (TCNQ) or2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ); ametal oxide, such as a tungsten oxide or a molybdenum oxide, andCompound HT-D1 illustrated below, but are not limited thereto.

The hole transport region may further include a buffer layer, inaddition to an electron blocking layer, a hole injection layer, and ahole transport layer. Since the buffer layer may compensate for anoptical resonance distance according to a wavelength of light emittedfrom the emission layer, light emission efficiency of a formed organiclight-emitting device may be improved. For use as a material included inthe buffer layer, materials that are to be included in the holetransport region may be used. The electron blocking layer preventsinjection of electrons from the electron transport region.

An emission layer is formed on the first electrode 110 or the holetransport region by using one or more suitable methods selected fromvacuum deposition, spin coating, casting, a LB method, ink-jet printing,laser-printing, and laser-induced thermal imaging. When an emissionlayer is formed by vacuum deposition or spin coating, deposition andcoating conditions for the emission layer may be the same as those forthe hole injection layer.

When the organic light-emitting device 10 is a full-color organiclight-emitting device, the emission layer may be patterned into a redemission layer, a green emission layer, or a blue emission layer,according to a sub-pixel. In one or more embodiments, the emission layermay have a stacked structure including a red emission layer, a greenemission layer, and a blue emission layer, or may include a redlight-emitting material, a green light-emitting material, and a bluelight-emitting material, which are mixed with each other in a singlelayer, to emit white light.

The emission layer may include a host and a dopant.

According to an embodiment of the present invention, the host mayinclude the compound represented by Formula 1.

According to an embodiment of the present invention, the dopant mayinclude the compound represented by Formula 1.

For example, the host may further include at least one selected fromTPBi, TBADN, ADN (also referred to as “DNA”), CBP, CDBP, and TCP:

In one or more embodiments, the host may include a compound representedby Formula 301 below.

Ar₃₀₁-[(L₃₀₁)_(xb1)-R₃₀₁]_(xb2)   <Formula 301>

In Formula 301,

Ar₃₀₁ may be selected from:

a naphthalene group, a heptalenev, a fluorene group, a spiro-fluorenegroup, a benzofluorene group, a dibenzofluorene group, a phenalenegroup, a phenanthrene group, an anthracene group, a fluoranthene group,a triphenylene, group, a pyrene group, a chrysene group, a naphthacenegroup, a picene group, a perylene group, a pentaphene group, and anindenoanthracene group; and

a naphthalene group, a heptalene group, a fluorene group, aspiro-fluorene group, a benzofluorene group, a dibenzofluorene group, aphenalene group, a phenanthrene group, an anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenegroup, a naphthacene group, a picene group, a perylene group, apentaphene group, and an indenoanthracene group, each substituted withat least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, monovalent non-aromaticcondensed heteropolycyclic group, and —Si(Q₃₀₁)(Q₃₀₂)(Q₃₀₃) (Q₃₀₁ toQ₃₀₃ may each independently be selected from hydrogen, a C₁-C₆₀ alkylgroup, a C₂-C₆₀ alkenyl group, a C₆-C₆₀ aryl group, and a C₁-C₆₀heteroaryl group),

L₃₀₁ may be selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorene group, a dibenzofluorenegroup, a phenanthrenylene group, an anthracenylene group, a pyrenylenegroup, a chrysenylene group, a pyridinylene group, a pyrazinylene group,a pyrimidinylene group, a pyridazinylene group, a quinolinylene group,an isoquinolinylene group, a quinoxalinylene group, a quinazolinylenegroup, a carbazolylene group, and a triazinylene group; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorene group, a dibenzofluorenegroup, a phenanthrenylene group, an anthracenylene group, a pyrenylenegroup, a chrysenylene group, a pyridinylene group, a pyrazinylene group,a pyrimidinylene group, a pyridazinylene group, a quinolinylene group,an isoquinolinylene group, a quinoxalinylene group, a quinazolinylenegroup, a carbazolylene group, and a triazinylene group, each substitutedwith at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, an isoindolyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group,

R₃₀₁ may be selected from:

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a phenyl group, a naphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazolyl group, and a triazinyl group, eachsubstituted with at least one selected from deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group,

xb1 may be selected from 0, 1, 2, and 3, and

xb2 may be selected from 1, 2, 3, and 4.

For example, in Formula 301,

L₃₀₁ may be selected from:

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, and a chrysenylene group; and

a phenylene group, a naphthylene group, a fluorenylene group, aspiro-fluorenylene group, a benzofluorenylene group, adibenzofluorenylene group, a phenanthrenylene group, an anthracenylenegroup, a pyrenylene group, and a chrysenylene group, each substitutedwith at least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, aphenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group;

R₃₀₁ may be selected from:

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group;

a C₁-C₂₀ alkyl group and a C₁-C₂₀ alkoxy group, each substituted with atleast one selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a phenyl group, a naphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, and a chrysenyl group;

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group; and

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, and a chrysenyl group,each substituted with at least one selected from deuterium, —F, —Cl,—Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group,an amidino group, a hydrazine group, a hydrazone group, a carboxylicacid group or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, and achrysenyl group, but embodiments of the present disclosure are notlimited thereto.

For example, the host may include a compound represented by Formula 301Abelow:

Substituents of Formula 301A may be understood by referring to thedescriptions provided herein.

The compound represented by Formula 301 may include at least one ofCompounds H1 to H42, but embodiments of the present disclosure are notlimited thereto:

In one or more embodiments, the host may include at least one ofCompounds H43 to H49 below, but embodiments of the present disclosureare not limited thereto:

The dopant may further include a known fluorescent dopant, or a knownphosphorescent dopant.

The phosphorescent dopant may include an organometallic complexrepresented by Formula 401 below:

In Formula 401,

M may be selected from iridium (Ir), platinum (Pt), osmium (Os),titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium(Tb), and thulium (TM);

X₄₀₁ to X₄₀₄ may each independently be nitrogen or carbon;

A₄₀₁ and A₄₀₂ ring may each independently be selected from: asubstituted or unsubstituted benzene group, a substituted orunsubstituted naphthalene group, a substituted or unsubstituted fluorenegroup, a substituted or unsubstituted spiro-fluorene group, asubstituted or unsubstituted indene group, a substituted orunsubstituted pyrrole group, a substituted or unsubstituted thiophenegroup, a substituted or unsubstituted furan group, a substituted orunsubstituted imidazole group, a substituted or unsubstituted pyrazolegroup, a substituted or unsubstituted thiazole group, a substituted orunsubstituted isothiazole group, a substituted or unsubstituted oxazolegroup, a substituted or unsubstituted isoxazole group, a substituted orunsubstituted pyridine group, a substituted or unsubstituted pyrazinegroup, a substituted or unsubstituted pyrimidine group, a substituted orunsubstituted pyridazine group, a substituted or unsubstituted quinolinegroup, a substituted or unsubstituted isoquinoline group, a substitutedor unsubstituted benzoquinoline group, a substituted or unsubstitutedquinoxaline group, a substituted or unsubstituted quinazoline group, asubstituted or unsubstituted carbazole group, a substituted orunsubstituted benzimidazole group, a substituted or unsubstitutedbenzofuran group, a substituted or unsubstituted benzothiophene group, asubstituted or unsubstituted isobenzothiophene group, a substituted orunsubstituted benzoxazole group, a substituted or unsubstitutedisobenzoxazole group, a substituted or unsubstituted triazole group, asubstituted or unsubstituted oxadiazole group, a substituted orunsubstituted triazine group, a substituted or unsubstituteddibenzofuran group, and a substituted or unsubstituted dibenzothiophenegroup,

at least one substituent of the substituted benzene group, thesubstituted naphthalene group, the substituted fluorene group, thesubstituted spiro-fluorene group, the substituted indene group, thesubstituted pyrrole group, the substituted thiophene group, thesubstituted furan group, the substituted imidazole group, thesubstituted pyrazole group, the substituted thiazole group, thesubstituted isothiazole group, the substituted oxazole group, thesubstituted isoxazole group, the substituted pyridine group, thesubstituted pyrazine group, the substituted pyrimidine group, thesubstituted pyridazine group, the substituted quinoline group, thesubstituted isoquinoline group, the substituted benzoquinoline group,the substituted quinoxaline group, the substituted quinazoline group,the substituted carbazole group, the substituted benzimidazole group,the substituted benzofuran group, the substituted benzothiophene group,the substituted isobenzothiophene group, the substituted benzoxazolegroup, the substituted isobenzoxazole group, the substituted triazolegroup, the substituted oxadiazole group, the substituted triazine group,the substituted dibenzofuran group, and the substituted dibenzothiophenegroup may be selected from:

deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed heteropolycyclic group,—N(Q₄₀₁)(Q₄₀₂), —Si(Q₄₀₃)(Q₄₀₄)(Q₄₀₅), and —B(Q₄₀₆)(Q₄₀₇);

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, and non-aromatic condensed polycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed heteropolycyclic group, —N(Q₄₁₁)(Q₄₁₂),—Si(Q₄₁₃)(Q₄₁₄)(Q₄₁₅), and —B(Q₄₁₆)(Q₄₁₇); and

—N(Q₄₂₁)(Q₄₂₂), —Si(Q₄₂₃)(Q₄₂₄)(Q₄₂₅), and —B(Q₄₂₆)(Q₄₂₇),

L₄₀₁ is an organic ligand,

xc1 is 1 , 2, or 3, and

xc2 is 0, 1, 2, or 3.

L₄₀₁ may be a monovalent, divalent, or trivalent organic ligand. Forexample, L₄₀₁ may be selected from a halogen ligand (for example, Cl orF), a diketone ligand (for example, acetylacetonate,1,3-diphenyl-1,3-propanedionate, 2,2,6,6-tetramethyl-3,5-heptanedionate,or hexafluoroacetonate), a carboxylic acid ligand (for example,picolinate, dimethyl-3-pyrazolecarboxylate, or benzoate), a carbonmonoxide ligand, an isonitrile ligand, a cyano group ligand, and aphosphorus ligand (for example, phosphine or phosphite), but embodimentsof the present disclosure are not limited thereto.

When A₄₀₁ in Formula 401 has two or more substituents, the substituentsof A₄₀₁ may be linked to form a saturated or unsaturated ring.

When A₄₀₁ in Formula 402 has two or more substituents, the substituentsof A₄₀₂ may be linked to form a saturated or unsaturated ring.

When xc1 in Formula 401 is two or more, a plurality of ligands havingthe structure

in Formula 401 may be identical to or different from each other. Whenxc1 in Formula 401 is two or more, A₄₀₁ and A₄₀₂ may be respectivelydirectly connected to A₄₀₁ and A₄₀₂ of other neighboring ligands with orwithout a linker (for example, a C₁-C₅ alkylene, or —N(R′)— (wherein R′may be a C₁-C₁₀ alkyl group or a C₆-C₂₀ aryl group) or —C(═O)—)therebetween.

The phosphorescent dopant may include at least one of Compounds PD1 toPD74 below, but embodiments of the present disclosure are not limitedthereto:

In one or more embodiments, the phosphorescent dopant may include PtOEP:

The fluorescent dopant may include at least one selected from DPAVBi,BDAVBi, TBPe, DCM, DCJTB, Coumarin 6, and C545T.

In one or more embodiments, the fluorescent dopant may include acompound represented by Formula 501 below.

In Formula 501,

Ar₅₀₁ may be selected from:

a naphthalene group, a heptalene group, a fluorene group, aspiro-fluorene group, a benzofluorene group, a dibenzofluorene group, aphenalene group, a phenanthrene group, an anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenegroup, a naphthacene group, a picene group, a perylene group, apentaphene group, and an indenoanthracene group; and

a naphthalene group, a heptalene group, a fluorene group, aspiro-fluorene group, a benzofluorene group, a dibenzofluorene group, aphenalene group, a phenanthrene group, an anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenev, anaphthacene group, a picene group, a perylene group, a pentaphene group,and an indenoanthracene group, each substituted with at least oneselected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, and —Si(Q₅₀₁)(Q₅₀₂)(Q₅₀₃) (whereinQ₅₀₁ to Q₅₀₃ may each independently be selected from hydrogen, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₆-C₆₀ aryl group, and a C₁-C₆₀heteroaryl group).

Descriptions of L₅₀₁ to L₅₀₃ are the same as the descriptions providedherein in connection with L₂₀₃;

R₅₀₁ and R₅₀₂ may each independently be selected from:

a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenylgroup, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenylgroup, an anthracenyl group, a pyrenyl group, a chrysenyl group, apyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinylgroup, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group,a quinazolinyl group, a carbazole group, a triazinyl group, adibenzofuranyl group, and a dibenzothiophenyl group; and

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, a triazinyl group, a dibenzofuranyl group, anddibenzothiophenyl group, each substituted with at least one selectedfrom deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, a biphenylgroup, a terphenyl group, a naphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, atriazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group,

xd1 to xd3 may each independently be selected from 0, 1, 2, and 3, and

xb4 may be selected from 1, 2, 3, and 4.

The fluorescent dopant may include at least one of Compounds FD1 to FD8:

A thickness of the emission layer may be in a range of about 100 Å toabout 1,000 Å, for example, about 200 Å to about 600 Å. When thethickness of the emission layer is within this range, excellentlight-emission characteristics may be obtained without a substantialincrease in driving voltage.

Then, an electron transport region may be disposed on the emissionlayer.

The electron transport region may include at least one selected from ahole blocking layer, an electron transport layer, and an electroninjection layer, but embodiments of the present disclosure are notlimited thereto.

When the electron transport region includes a hole blocking layer, thehole blocking layer may be formed on the emission layer by using one ormore suitable methods selected from vacuum deposition, spin coating,casting, a Langmuir-Blodgett (LB) deposition, ink-jet printing,laser-printing, and/or laser-induced thermal imaging. When the holeblocking layer is formed by vacuum deposition or spin coating,deposition and coating conditions for the hole blocking layer may bedetermined by referring to the deposition and coating conditions for thehole injection layer.

The hole blocking layer may include, for example, at least one of BCPand Bphen, but embodiments of the present disclosure are not limitedthereto.

A thickness of the hole blocking layer may be in a range of about 20 Åto about 1,000 Å, for example, about 30 Å to about 300 Å. When thethickness of the hole blocking layer is within these ranges, the holeblocking layer may have excellent hole blocking characteristics withouta substantial increase in driving voltage.

For example, the electron transport region may have an electrontransport layer/electron injection layer structure or a hole blockinglayer/electron transport layer/electron injection layer structure,wherein layers of each structure are sequentially stacked from theemission layer in the stated order, but the structure thereof is notlimited thereto.

According to an embodiment, the organic layer 150 of the organiclight-emitting device includes an electron transport region between theemission layer and the second electrode 190, and the electron transportregion may include an electron transport layer. The electron transportlayer may include a plurality of layers. For example, the electrontransport layer may include a first electron transport layer and asecond electron transport layer.

The electron transport layer may further include at least one selectedfrom BCP, Bphen, Alq₃, BAlq, TAZ, and NTAZ.

In one or more embodiments, the electron transport layer may include atleast one compound selected from a compound represented by Formula 601and a compound represented by Formula 602 illustrated below:

Ar₆₀₁-[(L₆₀₁)_(xe1)-E₆₀₁]_(xe2)   <Formula 601>

In Formula 601,

Ar₆₀₁ may be selected from:

a naphthalene group, a heptalene group, a fluorene group, aspiro-fluorene group, a benzofluorene group, a dibenzofluorene group, aphenalene group, a phenanthrene group, an anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenegroup, a naphthacene group, a picene group, a perylene group, apentaphene group, and an indenoanthracene group;

a naphthalene group, a heptalene group, a fluorene group, aspiro-fluorene group, a benzofluorene group, a dibenzofluorene group, aphenalene group, a phenanthrene group, an anthracene group, afluoranthene group, a triphenylene group, a pyrene group, a chrysenev, anaphthacene group, a picene group, a perylene group, a pentaphene group,and an indenoanthracene group, each substituted with at least oneselected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynylgroup, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group, a C₃-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₃-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, and —Si(Q₃₀₁)(Q₃₀₂)(Q₃₀₃) (whereinQ₃₀₁ to Q₃₀₃ may each independently be selected from hydrogen, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₆-C₆₀ aryl group, and a C₁-C₆₀heteroaryl group),

a description of L₆₀₁ may be understood by referring to the descriptionprovided in connection with L₃₀₁,

E₆₀₁ may be selected from:

a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, an imidazopyrimidinyl group; and

a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group, eachsubstituted with at least one selected from deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptylgroup, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, apentalenyl group, an indenyl group, a naphthyl group, an azulenyl group,a heptalenyl group, an indacenyl group, an acenaphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group,

xe1 may be selected from 0, 1, 2, and 3, and

xe2 may be selected from 1, 2, 3, and 4.

In Formula 602,

X₆₁₁ may be N or C-(L₆₁₁)_(xe611)-R₆₁₁, X₆₁₂ may be N orC-(L₆₁₂)_(xe612)-R₆₁₂, X₆₁₃ may be N or C-(L₆₁₃)_(xe613)-R₆₁₃, and atleast one selected from X₆₁₁ to X₆₁₃ may be N,

L₆₁₁ to L₆₁₆ may be understood by referring to the description providedherein in connection with L₃₀₁,

R₆₁₁ to R₆₁₆ may each independently be selected from:

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group; and

a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, afluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, apyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group,a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, anisoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, acarbazolyl group, and a triazinyl group, each substituted with at leastone selected from deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyanogroup, a nitro group, an amino group, an amidino group, a hydrazinegroup, a hydrazone group, a carboxylic acid group or a salt thereof, asulfonic acid group or a salt thereof, a phosphoric acid group or a saltthereof, a C₁-C₂₀ alkyl group, a C₁-C₂₀ alkoxy group, a phenyl group, abiphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group,a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenylgroup, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, achrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group,a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and atriazinyl group, and

xe611 to xe616 may each independently be selected from 0, 1, 2, and 3.

The compound represented by Formula 601 and the compound represented byFormula 602 may each be selected from Compounds ET1 to ET15 illustratedbelow.

A thickness of the electron transport layer may be in a range of about100 Å to about 1,000 Å, for example, about 150 Å to about 500 Å. Whenthe thickness of the electron transport layer is within the rangedescribed above, the electron transport layer may have satisfactoryelectron transport characteristics without a substantial increase indriving voltage.

Also, the electron transport layer may further include, in addition tothe materials described above, a metal-containing material.

The metal-containing material may include a Li complex. The Li complexmay include, for example, Compound ET-D1 (lithium quinolate, LiQ) orET-D2.

The electron transport region may include an electron injection layerthat facilitates injection of electrons from the second electrode 190.

The electron injection layer may be formed on the electron transportlayer by using one or more suitable methods selected from vacuumdeposition, spin coating, casting, a LB method, ink-jet printing,laser-printing, and laser-induced thermal imaging. When an electroninjection layer is formed by vacuum deposition or spin coating,deposition and coating conditions for the electron injection layer maybe the same as those for the hole injection layer.

The electron injection layer may include at least one selected from LiF,NaCl, CsF, Li₂O, BaO, and LiQ.

A thickness of the electron injection layer may be in a range of about 1Å to about 100 Å, for example, about 3 Å to about 90 Å. When thethickness of the electron injection layer is within the range describedabove, the electron injection layer may have satisfactory electroninjection characteristics without a substantial increase in drivingvoltage.

The second electrode 190 may be disposed on the organic layer 150 havingsuch a structure. The second electrode 190 may be a cathode which is anelectron injection electrode, and in this regard, a material for formingthe second electrode 190 may be selected from metal, an alloy, anelectrically conductive compound, and a mixture thereof, which have arelatively low work function. Examples of the second electrode 190 arelithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li),calcium (Ca), magnesium-indium (Mg—In), and magnesium-silver (Mg—Ag). Inone or more embodiments, the material for forming the second electrode190 may be ITO or IZO. The second electrode 190 may be a reflectiveelectrode, a semi-transmissive electrode, or a transmissive electrode.

Also, an organic layer according to an embodiment may be formed bydepositing the compound according to an embodiment, or may be formed byusing a wet method in which the compound according to an embodiment isprepared in the form of solution and then the solution of the compoundis used for coating.

An organic light-emitting device according to an embodiment may be usedin various flat panel display apparatuses, such as a passive matrixorganic light-emitting display apparatus or an active matrix organiclight-emitting display apparatus. For example, when the organiclight-emitting device is included in an active matrix organiclight-emitting display apparatus, a first electrode disposed on asubstrate acts as a pixel and may be electrically connected to a sourceelectrode or a drain electrode of a thin film transistor. In addition,the organic light-emitting device may be included in a flat paneldisplay apparatus that emits light in opposite directions.

Hereinbefore, the organic light-emitting device has been described withreference to FIG. 1, but embodiments of the present disclosure are notlimited thereto.

Hereinafter, definitions of substituents of compounds used herein willbe presented (the number of carbon atoms used to restrict a substituentis not limited, and does not limit properties of the substituent, andunless defined otherwise, the definition of the substituent isconsistent with a general definition thereof).

The term “C₁-C₆₀ alkyl group” as used herein refers to a linear orbranched saturated aliphatic hydrocarbon monovalent group having 1 to 60carbon atoms, and examples thereof include a methyl group, an ethylgroup, a propyl group, an isobutyl group, a sec-butyl group, atert-butyl group, a pentyl group, an iso-amyl group, and a hexyl group.The term “C₁-C₆₀ alkylene group” as used herein refers to a divalentgroup having the same structure as the C₁-C₆₀ alkyl group.

The term “C₁-C₆₀ alkoxy group” as used herein refers to a monovalentgroup represented by —OA₁₀₁ (wherein A₁₀₁ is the C₁-C₆₀ alkyl group),and examples thereof include a methoxy group, an ethoxy group, and anisopropyloxy group.

The term “C₂-C₆₀ alkenyl group” as used herein refers to a hydrocarbongroup having at least one carbon-carbon double bond in the middle or atthe terminus of the C₂-C₆₀ alkyl group, and examples thereof include anethenyl group, a propenyl group, and a butenyl group. The term “C₂-C₆₀alkenylene group” as used herein refers to a divalent group having thesame structure as the C₂-C₆₀ alkenyl group.

The term “C₂-C₆₀ alkynyl group” as used herein refers to a hydrocarbongroup having at least one carbon-carbon triple bond in the middle or atthe terminus of the C₂-C₆₀ alkyl group, and examples thereof include anethynyl group, and a propynyl group. The term “C₂-C₆₀ alkynylene group”as used herein refers to a divalent group having the same structure asthe C₂-C₆₀ alkynyl group.

The term “C₃-C₁₀ cycloalkyl group” as used herein refers to a monovalentsaturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, andexamples thereof include a cyclopropyl group, a cyclobutyl group, acyclopentyl group, a cyclohexyl group, and a cycloheptyl group. The term“C₃-C₁₀ cycloalkylene group” as used herein refers to a divalent grouphaving the same structure as the C₃-C₁₀ cycloalkyl group.

The term “C₁-C₁₀ heterocycloalkyl group” as used herein refers to amonovalent saturated monocyclic group having at least one heteroatomselected from N, O, P, and S as a ring-forming atom and 1 to 10 carbonatoms, and examples thereof include a tetrahydrofuranyl group, and atetrahydrothiophenyl group. The term “C₁-C₁₀ heterocycloalkylene group”used herein refers to a divalent group having the same structure as theC₁-C₁₀ heterocycloalkyl group.

The term “C₃-C₁₀ cycloalkenyl group” as used herein refers to amonovalent monocyclic group that has 3 to 10 carbon atoms and at leastone carbon-carbon double bond in the ring thereof and no aromaticity,and examples thereof include a cyclopentenyl group, a cyclohexenylgroup, and a cycloheptenyl group. The term “C₃-C₁₀ cycloalkenylenegroup” as used herein refers to a divalent group having the samestructure as the C₃-C₁₀ cycloalkenyl group.

The term “C₂-C₁₀ heterocycloalkenyl group” as used herein refers to amonovalent monocyclic group that has at least one heteroatom selectedfrom N, O, P, and S as a ring-forming atom, 2 to 10 carbon atoms, and atleast one carbon-carbon double bond in its ring. Examples of the C₂-C₁₀heterocycloalkenyl group include a 2,3-dihydrofuranyl group, and a2,3-dihydrothiophenyl group. The term “C₂-C₁₀ heterocycloalkenylenegroup” as used herein refers to a divalent group having the samestructure as the C₂-C₁₀ heterocycloalkenyl group.

The term “C₆-C₆₀ aryl group” as used herein refers to a monovalent grouphaving a carbocyclic aromatic system having 6 to 60 carbon atoms, andthe term “C₆-C₆₀ arylene group” as used herein refers to a divalentgroup having a carbocyclic aromatic system having 6 to 60 carbon atoms.Examples of the C₆-C₆₀ aryl group include a phenyl group, a biphenylgroup, a terphenyl group, a naphthyl group, an anthracenyl group, aphenanthrenyl group, a pyrenyl group, and a chrysenyl group. When theC₆-C₆₀ aryl group and the C₆-C₆₀ arylene group each include two or morerings, the rings may be fused to each other.

The term “C₁-C₆₀ heteroaryl group” as used herein refers to a monovalentgroup having a carbocyclic aromatic system that has at least oneheteroatom selected from N, O, P, and S as a ring-forming atom, inaddition to 1 to 60 carbon atoms. A C₁-C₆₀ heteroarylene group usedherein refers to a divalent group having a carbocyclic aromatic systemthat has at least one heteroatom selected from N, O, P, and S as aring-forming atom, in addition to 1 to 60 carbon atoms. Examples of theC₁-C₆₀ heteroaryl group are a pyridinyl group, a pyrimidinyl group, apyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinylgroup, and an isoquinolinyl group. When the C₁-C₆₀ heteroaryl group andthe C₁-C₆₀ heteroarylene group each include two or more rings, the ringsmay be fused to each other.

The term “C₆-C₆₀ aryloxy group,” used herein, indicates —OA₁₀₂ (whereinA₁₀₂ is the C₆-C₆₀ aryl group), and a C₆-C₆₀ arylthio group indicates—SA₁₀₃ (wherein A₁₀₃ is the C₆-C₆₀ aryl group).

The term “monovalent non-aromatic condensed polycyclic group” as usedherein refers to a monovalent group (for example, having 8 to 60 carbonatoms) having two or more rings condensed to each other, only carbonatoms as ring-forming atoms, and no aromaticity in its entire molecularstructure. Examples of the monovalent non-aromatic condensed polycyclicgroup include a fluorenyl group. The term “divalent non-aromaticcondensed polycyclic group” as used herein refers to a divalent grouphaving the same structure as the monovalent non-aromatic condensedpolycyclic group.

The term “monovalent non-aromatic condensed heteropolycyclic group” asused herein refers to a monovalent group (for example, having 2 to 60carbon atoms) having two or more rings condensed to each other, has aheteroatom selected from N, O, P, and S, other than carbon atoms, as aring-forming atom, and has no aromaticity in its entire molecularstructure. Non-limiting examples of the monovalent non-aromaticcondensed heteropolycyclic group include a carbazolyl group. The term“divalent non-aromatic condensed heteropolycyclic group” as used hereinrefers to a divalent group having the same structure as the monovalentnon-aromatic condensed heteropolycyclic group.

At least one substituent of the substituted C₃-C₁₀ cycloalkylene group,the substituted C₂-C₁₀ heterocycloalkylene group, the substituted C₃-C₁₀cycloalkenylene group, the substituted C₂-C₁₀ heterocycloalkenylenegroup, the substituted C₆-C₆₀ arylene group, the substituted C₁-C₆₀heteroarylene group, the substituted divalent non-aromatic condensedpolycyclic group, the substituted divalent non-aromatic condensedheteropolycyclic group, the substituted C₁-C₆₀ alkyl group, thesubstituted C₂-C₆₀ alkenyl group, the substituted C₂-C₆₀ alkynyl group,the substituted C₁-C₆₀ alkoxy group, the substituted C₃-C₁₀ cycloalkylgroup, the substituted C₂-C₁₀ heterocycloalkyl group, the substitutedC₃-C₁₀ cycloalkenyl group, the substituted C₂-C₁₀ heterocycloalkenylgroup, the substituted C₆-C₆₀ aryl group, the substituted C₆-C₆₀ aryloxygroup, the substituted C₆-C₆₀ arylthio group, the substituted C₁-C₆₀heteroaryl group, the substituted monovalent non-aromatic condensedpolycyclic group, and the substituted monovalent non-aromatic condensedheteropolycyclic group may be selected from:

deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,a monovalent non-aromatic condensed heteropolycyclic group,—N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and —B(Q₁₆)(Q₁₇);

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group;

a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed heteropolycyclic group, —N(Q₂₁)(Q₂₂),—Si(Q₂₃)(Q₂₄)(Q₂₅), and —B(Q₂₆)(Q₂₇); and

—N(Q₃₁)(Q₃₂), —Si(Q₃₃)(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇), and

Q₁₁ to Q₁₇, Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ may each independently beselected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀ cycloalkyl group,a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀ heteroarylgroup, a monovalent non-aromatic condensed polycyclic group, and amonovalent non-aromatic condensed heteropolycyclic group.

For example, at least one substituent of the substituted C₃-C₁₀cycloalkylene group, the substituted C₂-C₁₀ heterocycloalkylene group,the substituted C₃-C₁₀ cycloalkenylene group, the substituted C₂-C₁₀heterocycloalkenylene group, the substituted C₆-C₆₀ arylene group, thesubstituted C₁-C₆₀ heteroarylene group, the substituted divalentnon-aromatic condensed polycyclic group, the substituted divalentnon-aromatic condensed heteropolycyclic group, the substituted C₁-C₆₀alkyl group, the substituted C₂-C₆₀ alkenyl group, the substitutedC₂-C₆₀ alkynyl group, the substituted C₁-C₆₀ alkoxy group, thesubstituted C₃-C₁₀ cycloalkyl group, the substituted C₂-C₁₀heterocycloalkyl group, the substituted C₃-C₁₀ cycloalkenyl group, thesubstituted C₂-C₁₀ heterocycloalkenyl group, the substituted C₆-C₆₀ arylgroup, the substituted C₆-C₆₀ aryloxy group, the substituted C₆-C₆₀arylthio group, the substituted C₁-C₆₀ heteroaryl group, the substitutedmonovalent non-aromatic condensed polycyclic group, and the substitutedmonovalent non-aromatic condensed heteropolycyclic group may be selectedfrom:

deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group;

a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group,and a C₁-C₆₀ alkoxy group, each substituted with at least one selectedfrom deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, anitro group, an amino group, an amidino group, a hydrazine group, ahydrazone group, a carboxylic acid group or a salt thereof, a sulfonicacid group or a salt thereof, a phosphoric acid group or a salt thereof,a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, an imidazopyrimidinyl group, —N(Q₁₁)(Q₁₂),—Si(Q₁₃)(Q₁₄)(Q₁₅), and —B(Q₁₆)(Q₁₇);

a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group;

a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, and an imidazopyrimidinyl group, eachsubstituted with at least one selected from deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, acyclopentyl group, a cyclohexyl group, a cycloheptyl group, acyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenylgroup, an indenyl group, a naphthyl group, an azulenyl group, aheptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenylgroup, a spiro-fluorenyl group, a benzofluorenyl group, adibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, ananthracenyl group, a fluoranthenyl group, a triphenylenyl group, apyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group,a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenylgroup, a rubicenyl group, a coronenyl group, an ovalenyl group, apyrrolyl group, a thiophenyl group, a furanyl group, an imidazolylgroup, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, anoxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinylgroup, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, anindolyl group, an indazolyl group, a purinyl group, a quinolinyl group,an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, anaphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, acinnolinyl group, a carbazolyl group, a phenanthridinyl group, anacridinyl group, a phenanthrolinyl group, a phenazinyl group, abenzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, anisobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group,a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinylgroup, a dibenzofuranyl group, a dibenzothiophenyl group, abenzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group,an imidazopyridinyl group, an imidazopyrimidinyl group, —N(Q₂₁)(Q₂₂),—Si(Q₂₃)(Q₂₄)(Q₂₅), and —B(Q₂₆)(Q₂₇); and

—N(Q₃₁)(Q₃₂), —Si(Q₃₃)(Q₃₄)(Q₃₅), and —B(Q₃₆)(Q₃₇),

wherein Q₁₁ to Q₁₇, Q₂₁ to Q₂₇, and Q₃₁ to Q₃₇ may each independently beselected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, acyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a cyclopentyl group, acyclohexyl group, a cycloheptyl group, a cyclopentenyl group, acyclohexenyl group, a phenyl group, a pentalenyl group, an indenylgroup, a naphthyl group, an azulenyl group, a heptalenyl group, anindacenyl group, an acenaphthyl group, a fluorenyl group, aspiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group,a phenalenyl group, a phenanthrenyl group, an anthracenyl group, afluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenylgroup, a naphthacenyl group, a picenyl group, a perylenyl group, apentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenylgroup, a coronenyl group, an ovalenyl group, a pyrrolyl group, athiophenyl group, a furanyl group, an imidazolyl group, a pyrazolylgroup, a thiazolyl group, an isothiazolyl group, an oxazolyl group, anisoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinylgroup, a pyridazinyl group, an isoindolyl group, an indolyl group, anindazolyl group, a purinyl group, a quinolinyl group, an isoquinolinylgroup, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinylgroup, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, acarbazolyl group, a phenanthridinyl group, an acridinyl group, aphenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, abenzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group,a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, atetrazolyl group, an oxadiazolyl group, a triazinyl group, adibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolylgroup, a dibenzocarbazolyl group, a thiadiazolyl group, animidazopyridinyl group, and an imidazopyrimidinyl group.

The expression “Ph” used herein refers to a phenyl group, the expression“Me” used herein refers to a methyl group, the expression “Et” usedherein refers to an ethyl group, and the expression “ter-Bu” or “Bu^(t)”used herein refers to a tert-butyl group.

Hereinafter, an organic light-emitting device according to an embodimentwill be described in detail with reference to Synthesis Examples andExamples.

SYNTHESIS EXAMPLE Synthesis Example 1 Synthesis of Compound 19

1.64 g (7.08 mmol) of 4-phenyl-1-naphthaldehyde and 4.47 g (21.24 mmol)of 2,2,2,2-tetramethoxy-4,5-dimethyl-1,3,2-dioxaphospholene weredissolved in 5 mL of dichloromethane, and then, the reaction mixture wasstirred at a temperature of 70° C. for 24 hours. The reaction mixturewas cooled to room temperature, 5 mL of methanol was added theretodropwise, and then, the reaction mixture was stirred again at atemperature of 70° C. for 6 hours. The reaction mixture was then cooledto room temperature. Then, an extraction process was performed thereonthree times by using dichloromethane and water. An organic layerobtained therefrom was dried by using magnesium sulfate and filtered byusing celite. Then, column chromatography was performed thereon toobtain Intermediate4-hydroxy-3-(4-phenylnaphthalen-1-yl)pent-3-en-2-one.

A mixture of Intermediate4-hydroxy-3-(4-phenylnaphthalen-1-yl)pent-3-en-2-one, 0.65 g (3.54 mmol)of zinc(II) acetate, and 1.02 g (10.62 mmol) of sodium tert-butoxide wasdissolved in 20 mL of tetrahydrofuran, and then, the reaction mixturewas refluxed and stirred for 8 hours. The reaction mixture was thencooled to room temperature. Then, an extraction process was performedthereon three times by using dichloromethane and water. An organic layerobtained therefrom was dried by using magnesium sulfate and filtered byusing celite. Then, column chromatography was performed thereon toobtain 1.77 g (2.66 mmol, yield=75%) of Compound 19.

Synthesis Example 2 Synthesis of Compound 22

1.82 g (2.37 mmol, yield=67%) of Compound 22 was synthesized in the samemanner as in Synthesis Example 1, except that 2.00 g (7.08 mmol) of10-phenylanthracene-9-carbaldehyde was used instead of 1.64 g (7.08mmol) of 4-phenyl-1-naphthaldehyde, and Intermediate4-hydroxy-3-(10-phenylanthracen-9-yl)pent-3-en-2-one was used instead ofIntermediate 4-hydroxy-3-(4-phenylnaphthalen-1-yl)pent-3-en-2-one.

Synthesis Example 3 Synthesis of Compound 34

1.96 g (2.30 mmol, yield=65%) of Compound 34 was synthesized in the samemanner as in Synthesis Example 1, except that 2.29 g (7.08 mmol) of4-(diphenylamino)-1-naphthaldehyde was used instead of 1.64 g (7.08mmol) of 4-phenyl-1-naphthaldehyde, and Intermediate3-(4-(diphenylamino)naphthalen-1-yl)-4-hydroxypent-3-en-2-one was usedinstead of Intermediate4-hydroxy-3-(4-phenylnaphthalen-1-yl)pent-3-en-2-one.

Synthesis Example 4 Synthesis of Compound 136

2.33 g (2.12 mmol, yield=60%) of Compound 136 was synthesized in thesame manner as in Synthesis Example 1, except that 3.17 g (7.08 mmol) of10-(9-phenyl-9H-carbazol-3-yl)anthracene-9-carbaldehyde was used insteadof 1.64 g (7.08 mmol) of 4-phenyl-1-naphthaldehyde, and Intermediate4-hydroxy-3-(10-(9-phenyl-9H-carbazol-3-yl)anthracen-9-yl)pent-3-en-2-onewas used instead of Intermediate4-hydroxy-3-(4-phenylnaphthalen-1-yl)pent-3-en-2-one.

Synthesis Example 5 Synthesis of Compound 139

1.91 g (1.59 mmol, yield=45%) of Compound 139 was synthesized in thesame manner as in Synthesis Example 1, except that 3.52 g (7.08 mmol) of12-(9-phenyl-9H-carbazol-3-yl)chrysene-6-carbaldehyde was used insteadof 1.64 g (7.08 mmol) of 4-phenyl-1-naphthaldehyde, and Intermediate4-hydroxy-3-(12-(9-phenyl-9H-carbazol-3-yl)chrysen-6-yl)pent-3-en-2-onewas used instead of Intermediate4-hydroxy-3-(4-phenylnaphthalen-1-yl)pent-3-en-2-one.

Synthesis Example 6 Synthesis of Compound 142

2.11 g (1.84 mmol, yield=52%) of Compound 142 was synthesized in thesame manner as in Synthesis Example 1, except that 3.34 g (7.08 mmol) of6-(9-phenyl-9H-carbazol-3-yl)pyrene-1-carbaldehyde was used instead of1.64 g (7.08 mmol) of 4-phenyl-1-naphthaldehyde, and Intermediate4-hydroxy-3-(6-(9-phenyl-9H-carbazol-3-yl)pyren-1-yl)pent-3-en-2-one wasused instead of Intermediate4-hydroxy-3-(4-phenylnaphthalen-1-yl)pent-3-en-2-one.

¹H NMR and FAB-MS of the Compounds synthesized in the Synthesis Examplesare shown in Table 1.

Methods of synthesizing compounds other than the Compounds shown inTable 1 are easily recognizable by those of ordinary skill in the art byreferring to the synthesis paths and source materials described above.

TABLE 1 FAB-MS [M⁺] Compound ¹H NMR (CDCl₃, 500 MHz) found calc. 19

 δ = 8.12-8.09 (m, 4H), 7.95 (d, J = 8.3 Hz, 2H), 666.19 666.17 8.80(dd, J = 7.9 Hz, J = 1.9 Hz 2H), 7.49-7.42 (m, 8H), 7.40-7.36 (m, 2H),7.22 (td, J = 7.3 Hz, J = 1.9 Hz, 2H), 7.00 (td, J = 7.3 Hz, J = 1.9 Hz,2H), 1.90 (s, 6H), 1.64 (s, 6H). 22

 δ = 7.98 (dd, J = 8.1 Hz, J = 0.6 Hz, 4H), 766.22 766.21 7.87-7.83 (m,4H), 7.68 (dd, J = 8.1 Hz, J = 0.6, 4H), 7.50-7.45 (m, 4H), 7.41-7.37(m, 2H), 7.31 (td, J = 7.3 Hz, J = 2.0 Hz, 4H), 7.23 (td, J = 7.3 Hz, J= 2.0 Hz, 4H), 1.97 (s, 6H), 1.50 (s, 6H). 34

 δ = 7.88 (dd, J = 8.0 Hz, J = 2.6 2H), 7.57-7.54 (m, 848.29 848.26 2H),7.53-7.48 (m, 2H), 7.45 (d, J = 8.2 Hz, 2H), 7.06-7.01 (m, 8H), 6.89(td, J = 7.3 Hz, J = 2.0 Hz, 2H), 6.77 (dd, J = 8.2 Hz, 0.6 Hz, 2H),6.65-6.61 (m, 4H), 6.08-6.04 (m, 8H), 1.91 (s, 6H), 1.65 (s, 6H). 136

 δ = 8.27-8.25 (m, 4H), 7.78 (d, J = 8.4 Hz, 2H), 1096.37 1096.327.76-7.74 (m, 4H), 7.67-7.63 (m, 6H), 7.51-7.46 (m, 8H), 7.39-7.35 (m,2H), 7.33-7.24 (m, 10H), 7.21-7.18 (m, 4H), 1.97 (s, 6H), 1.48 (s, 6H).139

 δ = 9.45 (s, 2H), 8.93 (s, 2H), 8.73 (d, J = 8.2 Hz, 1196.43 1196.354H), 8.24 (d, J = 8.0 Hz, 2H), 8.19-8.18 (m, 2H), 8.01 (d, J = 8.2 Hz,2H), 7.82 (d, J = 8.0 Hz, 2H), 7.77-7.70 (m, 6H), 7.54-7.46 (m, 10H),7.39-7.27 (m, 6H), 7.25-7.23 (m, 2H), 7.22-7.20 (m, 4H), 1.93 (s, 6H),1.78 (s, 6H). 142

 δ = 8.52 (d, J = 7.6 Hz, 2H), 8.30 (d, J = 7.6 Hz, 2H), 1144.38 1144.328.19-8.13 (m, 6H), 7.92-7.89 (m, 10H), 7.70-7.62 (m, 8H), 7.58-7.50 (m,10H), 7.24-7.20 (m, 2H), 2.02 (s, 6H), 1.52 (s, 6H).

Comparative Example 1

As an anode, a Corning 15 Ω/cm² (1,200 Å) ITO glass substrate was cut toa size of 50 mm×50 mm×0.7 mm, sonicated with isopropyl alcohol and purewater each for 5 minutes, and then cleaned by exposure to ultravioletrays and ozone for 30 minutes. Then, the resultant ITO glass substratewas provided to a vacuum deposition apparatus.

Compound (2-TNATA), which is a known compound, was vacuum-deposited onthe ITO glass substrate to form a hole injection layer having athickness of 600 Å, and Compound NPB, which is a hole transportcompound, was vacuum-deposited on the hole injection layer to form ahole transport layer having a thickness of 300 Å.

9,10-di-naphthalene-2-yl-anthracene (ADN), which is a known bluefluorescent host, and N,N,N′,N′-tetraphenyl-pyrene-1,6-diamine (TPD),which is a known blue fluorescent dopant, were co-deposited on the holetransport layer at a weight ratio of 98:2 to form an emission layerhaving a thickness of 300 Å.

Then, Alq₃ was deposited on the emission layer to form an electrontransport layer having a thickness of 300 Å. LiF, which is an alkalimetal halide, was deposited on the electron transport layer to form anelectron injection layer having a thickness of 10 Å, and Al wasvacuum-deposited on the electron injection layer to form a LiF/Alelectrode (cathode electrode) having a thickness of 3,000 Å, therebycompleting the manufacture of an organic light-emitting device.

Comparative Example 2

In forming a blue emission layer, ADN and Compound Pt-1 wereco-deposited at a weight ratio of 98:2 to form an emission layer havinga thickness of 300 Å.

Comparative Example 3

In forming a blue emission layer, ADN and Compound Ir-1 wereco-deposited at a weight ratio of 98:2 to form an emission layer havinga thickness of 300 Å.

Example 1

In forming a blue emission layer, Compound 19 and TPD were co-depositedat a weight ratio of 98:2 to form an emission layer having a thicknessof 300 Å.

Example 2

In forming a blue emission layer, Compound 22 and TPD were co-depositedat a weight ratio of 98:2 to form an emission layer having a thicknessof 300 Å.

Example 3

In forming a blue emission layer, Compound 34 and TPD were co-depositedat a weight ratio of 98:2 to form an emission layer having a thicknessof 300 Å.

Example 4

In forming a blue emission layer, ADN and Compound 136 were co-depositedat a weight ratio of 98:2 to form an emission layer having a thicknessof 300 Å.

Example 5

In forming a blue emission layer, ADN and Compound 139 were co-depositedat a weight ratio of 98:2 to form an emission layer having a thicknessof 300 Å.

Example 6

In forming a blue emission layer, ADN and Compound 142 were co-depositedat a weight ratio of 98:2 to form an emission layer having a thicknessof 300 Å.

Results of Comparative Examples and Examples are shown in Table 2 below.

TABLE 2 Half Driving Current lifetime Host or voltage density LuminanceEfficiency Emission (hr @100 dopant (V) (mA/cm²) (cd/m²) (cd/A) colormA/cm²) Comparative — 6.01 50 3356 6.53 Blue 320 Example 1 ComparativePt-1 6.35 50 <100 <0.1 — — Example 2 Comparative Ir-1 6.23 50 <100 <0.1— — Example 3 Example 1 Compound 5.40 52 3400 6.90 Blue 360 19 Example 2Compound 5.35 56 3415 7.05 Blue 362 22 Example 3 Compound 5.23 55 33697.10 Blue 365 34 Example 4 Compound 5.98 57 3393 6.90 Blue 310 136Example 5 Compound 5.84 59 3415 7.60 Blue 360 139 Example 6 Compound5.82 56 3391 7.77 Blue 345 142

When Compounds having the structure of Formula 1 according to one ormore embodiments were used as a host or a dopant, all Examples exhibiteda low driving voltage and excellent I-V-L characteristics with improvedefficiency, as compared with Comparative Examples. In particular,Examples exhibited an excellent lifespan improvement effect. From theresults, it may be seen that the compounds according to one or moreembodiments are suitable for use as an electron transport material.

An organic light-emitting device according to an embodiment has highefficiency, a low driving voltage, high luminance, and a long lifespan.

It should be understood that embodiments described herein should beconsidered in a descriptive sense only and not for purposes oflimitation. Descriptions of features or aspects within each embodimentshould typically be considered as available for other similar featuresor aspects in other embodiments.

While one or more embodiments have been described with reference to thefigures, it will be understood by those of ordinary skill in the artthat various changes in form and details may be made therein withoutdeparting from the spirit and scope as defined by the following claims.

What is claimed is:
 1. A compound represented by Formula 1:

wherein, in Formula 1, Ar₁ and Ar₂ are each independently selected froma substituted or unsubstituted C₁-C₆₀ alkyl group, a substituted orunsubstituted C₂-C₆₀ alkenyl group, a substituted or unsubstitutedC₂-C₆₀ alkynyl group, a substituted or unsubstituted C₁-C₆₀ alkoxygroup, a substituted or unsubstituted C₃-C₁₀ cycloalkyl group, asubstituted or unsubstituted C₂-C₁₀ heterocycloalkyl group, asubstituted or unsubstituted C₃-C₁₀ cycloalkenyl group, a substituted orunsubstituted C₂-C₁₀ heterocycloalkenyl group, a substituted orunsubstituted C₆-C₆₀ aryl group, a substituted or unsubstituted C₆-C₆₀aryloxy group, a substituted or unsubstituted C₆-C₆₀ arylthio group, asubstituted or unsubstituted C₁-C₆₀ heteroaryl group, a substituted orunsubstituted monovalent non-aromatic condensed polycyclic group, and asubstituted or unsubstituted monovalent non-aromatic condensedheteropolycyclic group, L is selected from a substituted orunsubstituted C₆-C₆₀ arylene group, a substituted or unsubstitutedC₁-C₆₀ heteroarylene group, a substituted or unsubstituted divalentnon-aromatic condensed polycyclic group, and a substituted orunsubstituted divalent non-aromatic condensed heteropolycyclic group, lis 0 or 1, m is an integer from 1 to 5, n is 2 or 3, when m is two ormore, two or more L(s) are identical to or different from each other, Mindicates a post-transition metal or a transition metal, at least onesubstituent of the substituted C₁-C₆₀ alkyl group, the substitutedC₂-C₆₀ alkenyl group, the substituted C₂-C₆₀ alkynyl group, thesubstituted C₁-C₆₀ alkoxy group, the substituted C₃-C₁₀ cycloalkylgroup, the substituted C₂-C₁₀ heterocycloalkyl group, the substitutedC₃-C₁₀ cycloalkenyl group, the substituted C₂-C₁₀ heterocycloalkenylgroup, the substituted C₆-C₆₀ aryl group, the substituted C₆-C₆₀ aryloxygroup, the substituted C₆-C₆₀ arylthio group, the substituted C₁-C₆₀heteroaryl group, the substituted monovalent non-aromatic condensedpolycyclic group, the substituted monovalent non-aromatic condensedheteropolycyclic group, the substituted C₆-C₆₀ arylene group, thesubstituted C₁-C₆₀ heteroarylene group, the substituted divalentnon-aromatic condensed polycyclic group, and the substituted divalentnon-aromatic condensed heteropolycyclic group is selected from:deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitrogroup, an amino group, an amidino group, a hydrazine group, a hydrazonegroup, a carboxylic acid group or a salt thereof, a sulfonic acid groupor a salt thereof, a phosphoric acid group or a salt thereof, a C₁-C₆₀alkyl group, a C₂-C₆₀ alkenyl group, a C₂-C₆₀ alkynyl group, and aC₁-C₆₀ alkoxy group; a C₁-C₆₀ alkyl group, a C₂-C₆₀ alkenyl group, aC₂-C₆₀ alkynyl group, and a C₁-C₆₀ alkoxy group, each substituted withat least one selected from deuterium, —F, —Cl, —Br, —I, a hydroxylgroup, a cyano group, a nitro group, an amino group, an amidino group, ahydrazine group, a hydrazone group, a carboxylic acid group or a saltthereof, a sulfonic acid group or a salt thereof, a phosphoric acidgroup or a salt thereof, a C₃-C₁₀ cycloalkyl group, a C₁-C₁₀heterocycloalkyl group, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, aC₆-C₆₀ arylthio group, a C₂-C₆₀ heteroaryl group, a monovalentnon-aromatic condensed polycyclic group, a monovalent non-aromaticcondensed heteropolycyclic group, —N(Q₁₁)(Q₁₂), —Si(Q₁₃)(Q₁₄)(Q₁₅), and—B(Q₁₆)(Q₁₇); a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkylgroup, a C₃-C₁₀ cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, aC₆-C₆₀ aryl group, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, aC₁-C₆₀ heteroaryl group, a monovalent non-aromatic condensed polycyclicgroup, and a monovalent non-aromatic condensed heteropolycyclic group;and a C₃-C₁₀ cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀cycloalkenyl group, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ arylgroup, a C₆-C₆₀ aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group, eachsubstituted with at least one selected from deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₆-C₆₀aryloxy group, a C₆-C₆₀ arylthio group, a C₁-C₆₀ heteroaryl group, amonovalent non-aromatic condensed polycyclic group, a monovalentnon-aromatic condensed heteropolycyclic group, —N(Q₂₁)(Q₂₂),—Si(Q₂₃)(Q₂₄)(Q₂₅), and —B(Q₂₆)(Q₂₇), and Q₁₁ to Q₁₇ and Q₂₁ to Q₂₇ areeach independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I,a hydroxyl group, a cyano group, a nitro group, an amino group, anamidino group, a hydrazine group, a hydrazone group, a carboxylic acidgroup or a salt thereof, a sulfonic acid group or a salt thereof, aphosphoric acid group or a salt thereof, a C₁-C₆₀ alkyl group, a C₂-C₆₀alkenyl group, a C₂-C₆₀ alkynyl group, a C₁-C₆₀ alkoxy group, a C₃-C₁₀cycloalkyl group, a C₂-C₁₀ heterocycloalkyl group, a C₃-C₁₀ cycloalkenylgroup, a C₂-C₁₀ heterocycloalkenyl group, a C₆-C₆₀ aryl group, a C₁-C₆₀heteroaryl group, a monovalent non-aromatic condensed polycyclic group,and a monovalent non-aromatic condensed heteropolycyclic group.
 2. Thecompound of claim 1, wherein M in Formula 1 is Al, Ga, In, Sn, Tl, Pb,Bi, Po, Zn, Cu, Ti, Zr, Cr, Co, Ag, or Au.
 3. The compound of claim 1,wherein M in Formula 1 is Al, Zn, or Cu.
 4. The compound of claim 1,wherein two neighboring substituents of Ar₁, Ar₂, and L in Formula 1 arelinked to form a ring.
 5. The compound of claim 1, wherein Ar₁ and Ar₂in Formula 1 are each independently represented by one of Formulae 2a to2c:

wherein, in Formulae 2a to 2c, H₁ is O, S, NR₂₁, or CR₂₂R₂₃, R₂₁ to R₂₃and Z₁ are each independently selected from hydrogen, deuterium,halogen, a substituted or unsubstituted C₁-C₂₀ alkyl group, asubstituted or unsubstituted C₁-C₂₀ alkenyl group, a substituted orunsubstituted C₆-C₂₀ aryl group, a substituted or unsubstituted C₁-C₂₀heteroaryl group, a substituted or unsubstituted monovalent non-aromaticcondensed polycyclic group, and a substituted or unsubstitutedmonovalent non-aromatic condensed heteropolycyclic group, p is aninteger from 1 to 7, when p is two or more, two or more Z₁(s) areidentical to different from each other, and * indicates a binding site.6. The compound of claim 1, wherein L in Formula 1 is represented by oneof Formulae 3a to 3e:

wherein, in Formulae 3a to 3e, Z₁ is selected from hydrogen, deuterium,halogen, a substituted or unsubstituted C₁-C₂₀ alkyl group, asubstituted or unsubstituted C₆-C₂₀ aryl group, a substituted orunsubstituted C₁-C₂₀ heteroaryl group, a substituted or unsubstitutedmonovalent non-aromatic condensed polycyclic group, and a substituted orunsubstituted monovalent non-aromatic condensed heteropolycyclic group,when p is two or more, two or more Z₁(s) are identical to or differentfrom each other, and * indicates a binding site.
 7. The compound ofclaim 4, wherein the compound represented by Formula 1 is represented byFormula 2:


8. The compound of claim 4, wherein the compound represented by Formula1 is represented by Formula 3:

wherein L′ is the same as described in connection with L in Formula 1.9. The compound of claim 1, wherein the compound represented by Formula1 is represented by Formula 4:

wherein, in Formula 4, Z₁ is selected from hydrogen, deuterium, halogen,a substituted or unsubstituted C₁-C₂₀ alkyl group, a substituted orunsubstituted C₆-C₂₀ aryl group, a substituted or unsubstituted C₁-C₂₀heteroaryl group, a substituted or unsubstituted monovalent non-aromaticcondensed polycyclic group, and a substituted or unsubstitutedmonovalent non-aromatic condensed heteropolycyclic group, and when p istwo or more, two or more Z₁(s) are identical to or different from eachother.
 10. The compound of claim 1, wherein the compound represented byFormula 1 is represented by Formula 5:


11. The compound of claim 1, wherein the compound represented by Formula1 is represented by Formula 6:


12. The compound of claim 1, wherein the compound represented by Formula1 is represented by Formula 7:


13. The compound of claim 1, wherein the compound represented by Formula1 is Formula 8:


14. The compound of claim 1, wherein the compound represented by Formula1 is any one of compounds below:


15. An organic light-emitting device comprising: a first electrode; asecond electrode facing the first electrode; and an organic layer thatis disposed between the first electrode and the second electrode andcomprises an emission layer and the compound of claim
 1. 16. The organiclight-emitting device of claim 15, wherein the emission layer is a blueemission layer.
 17. The organic light-emitting device of claim 15,wherein the emission layer is a blue fluorescent emission layer.
 18. Theorganic light-emitting device of claim 15, wherein the emission layercomprises a host and a dopant, and the host comprises the compound ofclaim
 1. 19. The organic light-emitting device of claim 15, wherein theemission layer comprises a host and a dopant, and the dopant comprisesthe compound of claim
 1. 20. A display apparatus comprising: the organiclight-emitting device of claim 15, wherein the first electrode of theorganic light-emitting device is electrically connected to a sourceelectrode or a drain electrode of a thin-film transistor.